/****************************************************************************
 *  QLyrics - A simple lyrics viewer.                                       *
 *  Copyright (C) 2008  hsys <hanshuiys@gmail.com>                          *
 *                                                                          *
 *  This program is free software; you can redistribute it and/or modify    *
 *  it under the terms of the GNU General Public License as published by    *
 *  the Free Software Foundation; either version 3 of the License, or       *
 *  (at your option) any later version.                                     *
 *                                                                          *
 *  This program is distributed in the hope that it will be useful,         *
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of          *
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
 *  GNU General Public License for more details.                            *
 *                                                                          *
 *  You should have received a copy of the GNU General Public License       *
 *  along with this program; if not, write to the Free Software Foundation, *
 *  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA       *
 ****************************************************************************/

#ifndef _LYRICSPANELMANAGER_H_
#define _LYRICSPANELMANAGER_H_

#include <vector>
#include <QObject>
#include "lyricspanel.h"

/** This class is used to manager panels. */
class LyricsPanelManager : public QObject {
    Q_OBJECT
public:
    /** Get the pointer of instance of the class, since the class is a singleton. */
    static void buildInstance(QObject* parent = 0);
    static LyricsPanelManager* getInstance();
    /** Return the builder object of panel, according to the specific name. */
    const LyricsPanel::Builder* findPanel(const QString& name) const;

    /** Iterator type for panel builders. */
    typedef std::vector<LyricsPanel::Builder*>::const_iterator const_iterator;
    /** Return a iterator pointing to the beginning of the panel list. */
    const_iterator begin() const { return m_panelPrototype.begin(); };
    /** Return a iterator pointing to the end of the panel list. */
    const_iterator end() const { return m_panelPrototype.end(); };

private:
    /** Panel list. */
    std::vector<LyricsPanel::Builder*> m_panelPrototype;

    static LyricsPanelManager* sm_inst;

    LyricsPanelManager(QObject* parent = 0);
    ~LyricsPanelManager();
};

#endif
